Re: USRP B200mini Does Not Work in Gnu Radio With Latest Version of Linux Mint (21.2)

[Marcus D. Leech]

On 24/07/2023 22:13, Gary Schafer wrote:
> I just upgraded my system from Linux Mint 21.1 to 21.2. My system is 
> an Intel i7-6700 based desktop with 32 GB of RAM. After loading the OS 
> and going through my usual routine of loading programs and drivers, I 
> discovered that I cannot use my USRP B200mini. I tried running a basic 
> Gnu Radio flowgraph of USRP source to a frequency sink as a quick 
> test. Right after I started it, it stopped with the statement, "Done 
> (return code-11)". I'm not certain if this is a Gnu Radio problem, 
> Mint problem, or USRP problem. I *suspect* it's a Mint / USRP problem. 
> I've loaded libuhd4.1.0 as well as libuhd-dev and uhd-host. Normally, 
> that's all that is required.
>
> When I run "uhd_find_devices", I get:
>
> [INFO] [UHD] linux; GNU C++ version 11.2.0; Boost_107400; UHD_4.1.0.5-3
> --------------------------------------------------
> -- UHD Device 0
> --------------------------------------------------
> Device Address:
>     serial: 11160936550978964554
>     default_input: False
>     default_output: False
>     device_id: 4
>     driver: audio
>     label: Monitor of GM204 High Definition Audio Controller Digital 
> Stereo (HDMI 3)
>     type: soapy
>
> --------------------------------------------------
> -- UHD Device 1
> --------------------------------------------------
> Device Address:
>     serial: 12015008079946540021
>     default_input: True
>     default_output: False
>     device_id: 0
>     driver: audio
>     label: C922 Pro Stream Webcam Analog Stereo
>     type: soapy
>
> --------------------------------------------------
> -- UHD Device 2
> --------------------------------------------------
> Device Address:
>     serial: 13719246102091647219
>     default_input: False
>     default_output: False
>     device_id: 3
>     driver: audio
>     label: Monitor of Built-in Audio Analog Stereo
>     type: soapy
>
> --------------------------------------------------
> -- UHD Device 3
> --------------------------------------------------
> Device Address:
>     serial: 3279479
>     name: B200mini
>     product: B200mini
>     type: b200
>
> Further, when I run uhd_usrp_probe, I get the following:
>
> INFO] [UHD] linux; GNU C++ version 11.2.0; Boost_107400; UHD_4.1.0.5-3
>   _____________________________________________________
>  /
> |       Device: Audio
> |     _____________________________________________________
> |    /
> |   |       Mboard: Audio
> |   |   device_id: 0
> |   |   origin: https://github.com/pothosware/SoapyAudio
> |   |
> |   |   Time sources:
> |   |   Clock sources:
> |   |   Sensors:
> |   |     _____________________________________________________
> |   |    /
> |   |   |       RX DSP: 0
> |   |   |
> |   |   |   Freq range: 0.000 to 0.000 MHz
> |   |     _____________________________________________________
> |   |    /
> |   |   |       RX Dboard: 0
> |   |   | _____________________________________________________
> |   |   |    /
> |   |   |   |       RX Frontend: 0
> |   |   |   |   Name: SoapyRF
> |   |   |   |   Antennas: RX
> |   |   |   |   Sensors:
> |   |   |   |   Freq range: 0.000 to 6000.000 MHz
> |   |   |   |   Gain Elements: None
> |   |   |   |   Bandwidth range: 0.0 to 0.0 step 0.0 Hz
> |   |   |   |   Connection Type: IQ
> |   |   |   |   Uses LO offset: No
> |   |   | _____________________________________________________
> |   |   |    /
> |   |   |   |       RX Codec: 0
> |   |   |   |   Name: SoapyADC
> |   |   |   |   Gain Elements: None
> |   |     _____________________________________________________
> |   |    /
> |   |   |       TX DSP: 0
> |   |   |
> |   |   |   Freq range: 0.000 to 0.000 MHz
> |   |     _____________________________________________________
> |   |    /
> |   |   |       TX Dboard: 0
> |   |   | _____________________________________________________
> |   |   |    /
> |   |   |   |       TX Frontend: 0
> |   |   |   |   Name: None
> |   |   |   |   Antennas:
> |   |   |   |   Sensors:
> |   |   |   |   Freq range: 0.000 to 0.000 MHz
> |   |   |   |   Gain Elements: None
> |   |   |   |   Bandwidth range: 0.0 to 0.0 step 0.0 Hz
> |   |   |   |   Connection Type: IQ
> |   |   |   |   Uses LO offset: No
> |   |   | _____________________________________________________
> |   |   |    /
> |   |   |   |       TX Codec: 0
> |   |   |   |   Name: None
> |   |   |   |   Gain Elements: None
>
> This does not seem correct. For example, when running the same command 
> on another system still running 21.1, I get much more detailed 
> information about the B200mini. (It also says that it is loading a 
> firmware image right after starting the command, which does not happen 
> here.)
>
> If anyone has any ideas, I'm all ears.
>
> Thanks,
>
> Gary
This looks like some confusion in the kernel about USB VID/PID values?

What does "lsusb" produce?

For USB devices, "uhd_find_devices" will look for USB devices with the 
correct VID/PID for NI/Ettus devices.  In your case, things
  seem quite confused.   This is likely to be a kernel issue, or maybe 
a "libusb" issue.  Dunno.